JP4756324B2 - Synthetic resin housing - Google Patents

Description

  The present invention relates to a synthetic resin casing, and more particularly to a synthetic resin casing used as a container for sale in which a liquid content is filled and a label is attached to the outer surface after closing.

Synthetic resin casings used as containers for sale filled with liquid contents such as fruit juice and oolong tea are usually printed without directly printing the product image and quality maintenance requirements on the casing. It is common to wrap a label.
In addition, it is well known that in the case of a synthetic resin casing having a cylindrical shape, the pressure inside the casing changes when the contents liquid is filled and closed under various conditions. Since the housing may be deformed and the commercial value may be impaired, a synthetic resin housing with a cylindrical basic shape is provided with a reduced-pressure absorption panel or a flat wall to reinforce the reduction in rigidity of the body due to reduced pressure. A concave or convex rib having a cross-sectional arc shape is provided on the surface (see Patent Document 1).
Further, as a small capacity synthetic resin casing, an annular groove portion is provided on the peripheral wall of the casing, a lateral rib extending all around the annular groove portion is continuously provided, and a decompression absorption panel formed below the lateral rib is provided. A synthetic resin casing having an upper end substantially adjacent to the lateral rib has been proposed (see Patent Document 2).
JP 2001-206331 A JP 2002-332022 A

However, as described in Patent Document 1, the unevenness provided on the flat wall of the casing particularly affects the appearance of characters and patterns drawn on a shrink label or the like attached to the surface of the casing. When an image drawn on a two-dimensional surface extends over a plurality of body part dividing surfaces, the boundary between the dividing surfaces becomes discontinuous, and the display content becomes difficult to see, or the original display design image is damaged by the illusion.
In addition, in a casing provided with a label on the body portion, in order to make the characters printed on the surface of the label easier to see, or to prevent the design image such as a pattern printed on the surface of the label from being changed, Increase the number of faces of the part to make it polygonal, and the closer the section is to a cylindrical shape, the more it becomes possible, but simply increasing the number of faces of the body body will reduce the vacuum absorption inside the body The area of the surface having a small area becomes small, and a sufficient function cannot be obtained. For this reason, irregular decompression deformation may occur, or a reduction in rigidity may be caused by narrowing the width of the concave or convex rib provided for the purpose of reinforcing the strength disposed in the body.
Furthermore, as described in Patent Document 2, the circumferentially continuous annular groove provided for reinforcing the strength around the reduced pressure absorption surface prevents lateral force against the body and deformation around the reduced pressure absorption panel. Is effective, but it is counterproductive to the vertical load strength, which is the load in the height direction of the housing, and often results in a decrease in strength.
In addition, due to the presence of the annular groove and the lateral rib extending all around as described in Patent Document 2, it is difficult to see the printed surface of the label due to the unevenness of the formed body trunk.
An object of the present invention is to synthesize a plastic resin casing used as a commercially available sales container by filling a liquid content and sealing the outer surface of the casing with a label printed with characters, designs, etc. There are no annular grooves, ribs, etc., and the irregular shape on the surface of the housing does not affect the design image of the characters on the label, the design, etc. It is providing the synthetic resin casing which has these.

The invention according to claim 1 solves the above-mentioned problem, and a plurality of reduced-pressure absorption panels are provided on the peripheral wall, and a concave reinforcing panel is provided between the reduced-pressure absorption panels near the upper portion of the reduced-pressure absorption panel. Is located on a line connecting the upper end position of the vacuum absorption panel in the circumferential direction, but the upper end and the lower end position of the reinforcing panel are not on the line, and the width of the column between the vacuum absorption panels is the largest in the middle part of the trunk part. The gist is a synthetic resin casing characterized in that the width of the reinforcing panel is narrower than that of the column between the reduced pressure absorption panels .

  In the present invention, the plurality of vacuum absorbing panels absorb the vacuum deformation and prevent the shape of the housing from being deformed, and a plurality of concave shapes are formed between the vacuum absorbing panels near the top of the vacuum absorbing panel. By providing the reinforcing panel, the rigidity of the trunk in the vicinity of the upper part of the vacuum absorbing panel is improved, and there is no concave or convex rib continuous in the circumferential direction as in the conventional product, so the buckling strength is Furthermore, even when full shrink is attached, the surface of the housing is less likely to appear uneven, and the design of the characters on the label, the design, etc. will not be impaired.

  In the present invention, a concave reinforcing panel may be provided between the vacuum absorbing panels near the lower part of the vacuum absorbing panel.

  In the present invention, the reinforcing panel provided in the vicinity of the lower portion of the reduced pressure absorption panel is located on a line connecting the lower end positions of the reduced pressure absorption panel in the circumferential direction, but the upper end and lower end positions of the reinforcing panel are not on the line.

In the present invention, by the narrowest with the structures to Turkey the barrel central portion of the width of the pillar between the vacuum panels, deformation due to the rigidity of the pillar of the body central portion reduced pressure inferior to other vacuum panels Can not be.
Also, the contour of the vacuum absorption panel corresponding to the shape of such a column is thick in the center in the vertical direction, and the upper and lower parts are in the shape of a thin arc. The unevenness of the body trunk is not particularly noticeable.

  The reduced pressure absorption panel is constituted by an arc-shaped first panel adjacent to the column portion and a second panel having a curved surface further recessed than the concave curved surface inside the first panel, which is located inside the first panel. Can do. With such a configuration, a vacuum absorbing panel having stable vacuum absorbing performance and not affecting the label surface is provided.

  In the reduced pressure absorption panel composed of the first panel and the second panel, the first panel has a concave curved surface having the shallowest depth at the upper and lower ends, the deepest central portion of the panel, and a depth of about 2 mm or less. The second panel is deeper than the first panel and is 0.1 to 4.5 mm, preferably 0.2 to 4.0 mm.

  In the vacuum absorption panel composed of the first panel and the second panel, the ridge line of the first panel and the ridge line of the second panel are connected by almost one R at the deepest portion of the vacuum absorption panel corresponding to the central portion of the trunk.

  The reinforcing panel has a drop profile. Moreover, the width | variety of a reinforcement panel is below the width | variety of a decompression absorption panel. The depth of the reinforcing panel is not less than the depth of the first panel, and preferably 0.5 to 2.5 mm.

  The synthetic resin casing of the present invention can be used particularly effectively as a casing having a small capacity of 200 to 900 ml.

  In the present invention, it is possible to provide a synthetic resin casing having a plurality of reinforcing panels arranged at intervals in the circumferential direction, thereby improving the rigidity of the trunk and increasing the buckling strength.

  The synthetic resin casing of the present invention is provided with a plurality of reduced pressure absorption panels on the peripheral wall, and a concave reinforcing panel is provided between the reduced pressure absorption panels near the upper portion of the reduced pressure absorption panel. The panel not only absorbs deformation under reduced pressure and prevents deformation of the housing shape, but also has a plurality of concave reinforcing panels provided between the reduced pressure absorption panels near the top of the reduced pressure absorption panel. The rigidity of the torso near the upper part of the absorption panel is improved, and there is no concave or convex rib that is continuous in the circumferential direction as in the conventional product, so the buckling strength is increased and full shrink is attached. Even in the state, the surface of the housing is less likely to appear uneven, and the design of label characters, designs, etc. is not impaired.

  FIG. 1 is a side view showing an embodiment of the present invention. FIG. 2 is an enlarged sectional view taken along line AA shown in FIG. FIG. 3 is an enlarged cross-sectional view showing a portion surrounded by a circle B shown in FIG. 2 together with a shrink label attached to the housing.

  The synthetic resin casing of this embodiment includes eight decompression absorption panels 2 on the peripheral wall 1, and an octahedron having a concave reinforcing panel 3 between the decompression absorption panels 2 near the upper portion of the decompression absorption panel 2. This is a rigid resin housing.

  In the rigid resin casing of the present invention, the width of the column 4 between the reduced pressure absorption panels 2 is set so that the rigidity of the column at the central portion of the trunk portion is increased and deformation due to reduced pressure does not reach other than the reduced pressure absorption panel. Is the narrowest.

  Corresponding to the shape of the pillar 4, the vacuum absorbing panel 2 is formed in a circular arc shape with a thick central part in the vertical direction and a thin upper part and lower part. By forming the reduced pressure absorption panel 2 in such a shape, for example, the unevenness of the housing body becomes inconspicuous as compared with, for example, a long hole-shaped reduced pressure absorption panel.

  The reduced pressure absorption panel 2 includes an arc-shaped first panel 2a adjacent to the column 4 and a second panel 2b located inside the first panel 2a. The first panel 2a and the second panel 2b are arranged so that the centers of the panels coincide with each other when viewed from the front, and the second panel 2b has a curved surface that is further recessed than the concave curved surface inside the first panel 2a.

  The first panel 2a has a concave curved surface having the shallowest depth at both upper and lower ends, the deepest panel central portion, and a depth of about 2 mm or less. The second panel 2b is deeper than the first panel 2a and has a thickness of 1.0 to 4.5 mm, preferably 0.2 to 4.0 mm.

  As shown in FIG. 2, the ridge line of the first panel 2a and the ridge line of the second panel 2b are connected by almost one R at the deepest portion of the vacuum absorption panel 2 corresponding to the central portion of the trunk portion, and the concave curved surface. Share.

  In the state where the shrink label is attached to the housing, as shown in FIG. 3, the recesses of the panels of the first panel 2 a and the second panel 2 b are located below the shrink label 5 in the middle part of the trunk portion. Unevenness is hardly reflected in 5. On the other hand, in the vicinity of the upper and lower portions of the vacuum absorbing panel 2, the width of the pillar is wide, and the width of the vacuum absorbing panel is narrow and shallow. The shrink label is attached to the body of the housing so that it can be easily seen.

  Since the first panel 2a of the reduced pressure absorption panel 2 becomes shallow at the place where the width of the pillar 4 is widened, sufficient rigidity cannot be obtained. The reinforcement panel is located between the vacuum absorption panels near the upper portion of the vacuum absorption panel 2 to compensate for the insufficient rigidity, and the rigidity can be improved without providing an annular lateral rib as in the prior art. , Thereby increasing the buckling strength.

  The reinforcing panel 3 has a drop profile. The width of the reinforcing panel 3 is equal to or smaller than the width of the vacuum absorbing panel 2. Moreover, the depth of the reinforcement panel 3 is more than the depth of the 1st panel 2a, and is 0.5-2.5 mm.

  The reinforcing panel is located on a line connecting the upper end positions of the vacuum absorbing panel in the circumferential direction, and the upper end and lower end positions of the reinforcing panel are not on the line.

  In the present invention, the liquid contents are heated and filled by the plurality of reduced pressure absorption panels 2, and the deformation of the casing due to the decrease in the casing pressure after closing is absorbed, and the deformation of the casing shape is prevented. In addition, by providing a plurality of concave reinforcing panels 3 between the vacuum absorption panels 2 in the vicinity of the upper portion of the vacuum absorption panel 2, the rigidity of the trunk in the vicinity of the upper portion of the vacuum absorption panel 3 is improved. Since there are no concave or convex ribs in the circumferential direction unlike conventional products, the buckling strength is increased, and even when full shrink is attached, the unevenness on the surface of the housing does not appear easily, and the characters on the label The design such as the design will not be damaged.

FIG. 4 shows a modification of the embodiment of the present invention. In this embodiment, a concave reinforcing panel 3 is provided between the vacuum absorbing panels near the lower portion of the vacuum absorbing panel. In a modification of this embodiment, the reinforcing panel provided in the vicinity of the lower part of the vacuum absorbing panel is located on a line connecting the lower end position of the vacuum absorbing panel in the circumferential direction, but the upper end and the lower end position of the reinforcing panel are on the line. Not.
In the modification of this embodiment, other configurations are the same as those shown in FIG.

  The synthetic resin casing of the present invention can be used particularly effectively as a casing having a small capacity of 200 to 900 ml.

  In addition to the above-described embodiment, a plurality of reinforcing panels are provided at intervals in the circumferential direction on the housing body to improve the rigidity of the body, and without being provided with annular lateral ribs, In addition, a synthetic resin casing with increased buckling strength can be configured.

  500 ml of an octahedral PET bottle having a reduced pressure absorption panel and a reinforcing panel according to the present invention shown in FIG. 1 obtained by biaxial stretching blow molding a 23.8 g preform formed from polyethylene terephthalate (PET) as a raw material resin. Was molded. The PET bottle was filled with water, and the mouth was sealed and sealed, and a shrink label on which a pattern was printed was attached around the casing.

[Comparative Example 1]
As shown in FIG. 5, a 500 ml plastic bottle having a vacuum absorbing panel 6 having an arcuate contour and a circular reinforcing panel 7 between the vacuum absorbing panels 6 is prepared. In a state where the part was sealed and sealed, a shrink label on which a pattern was printed was attached over a wide area around the housing.

[Comparative Example 2]
As shown in FIG. 6, a 500 ml PET bottle provided with a rectangular decompression absorbing spring 8 and a lateral rib 9 is prepared. The PET bottle is filled with water, and the mouth is sealed and sealed. A wide range of shrink labels with printed patterns were attached.

[Comparative Example 3]
As shown in FIG. 7, a 500 ml PET bottle having an arc-shaped vacuum absorbing panel 10 and a lateral rib 11 is prepared, the PET bottle is filled with water, and the casing is sealed and sealed. A shrink label with a pattern printed on it was installed over a wide area.

  Regarding the bottles of Examples and Comparative Examples 1, 2, and 3, in the state where the air is extracted from the head space using the injection needle and depressurized by a certain amount, (Confirmation) and (2) It was evaluated whether the pattern of the shrink label can be continuously seen at the boundary of the divided surface even over the divided surface region of the trunk, assuming the state of being displayed on the product shelf. The results are shown in Table 1.

As shown in Table 1, in Example 1, the image of the shrink label can be seen continuously, the label appearance is good, the decompression deformation of the pillar is not seen, the buckling strength is high, and the overall evaluation is good. Met.
On the other hand, in the comparative example 1, the unevenness | corrugation of the column part was seen and the external appearance of the shrink label was not favorable. In Comparative Example 2, the appearance of the shrink label was bad due to the unevenness of the trunk formed by providing the lateral ribs. In Comparative Example 3, irregularities due to multiple facets were seen, and the appearance of the shrink label was bad.

  The synthetic resin casing of the present invention can be used as a packaging container in which liquid contents such as load, oolong tea, and Japanese tea are heated and filled, and in particular, it can be particularly effectively used as a casing having a small capacity of 200 to 900 ml. it can.

It is a side view of an embodiment of a synthetic resin casing of the present invention. FIG. 2 is an enlarged sectional view taken along line AA shown in FIG. 1. It is an expanded sectional view shown with the shrink label with which the part enclosed with the circle | round | yen B shown in FIG. 2 was mounted | worn with the housing. It is a side view of another embodiment of the synthetic resin casing of the present invention. It is a side view of the housing of the comparative example 1. It is a side view of the housing of the comparative example 2. It is a side view of the housing of the comparative example 3.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Perimeter wall 2 Pressure-reduction absorption panel 2a 1st panel 2b 2nd panel 3 Reinforcement panel 4 Pillar part 5 Shrink label 6 Decompression-absorption panel 7 Circular reinforcement panel 8 Decompression-absorption panel 9 Lateral rib 10 Decompression-absorption panel 11 Lateral rib

Claims (8)

A plurality of vacuum absorption panels are provided on the peripheral wall, and concave reinforcement panels are provided between the vacuum absorption panels near the top of the vacuum absorption panel,
The reinforcing panel is located on a line connecting the upper end position of the vacuum absorbing panel in the circumferential direction, but the upper end and lower end positions of the reinforcing panel are not on the line,
The width of the column between the vacuum absorption panels is the narrowest at the center of the trunk,
The width of the reinforcing panel is widely than the width of the pillar between the vacuum panels,
The reduced pressure absorption panel is composed of an arc-shaped first panel adjacent to the pillar portion and a second panel located inside the first panel,
In the deepest part of the vacuum absorbing panel, the ridge line of the first panel and the ridge line of the second panel are connected by almost one R,
The first panel has a concave surface with the shallowest depth at the upper and lower ends, the deepest at the center of the panel, and a depth of 2 mm or less. A synthetic resin casing having a depth of 5 mm .   The synthetic resin casing according to claim 1, further comprising a concave reinforcing panel provided between the vacuum absorbing panels near the lower part of the vacuum absorbing panel.   The reinforcing panel provided in the vicinity of the lower part of the reduced pressure absorption panel is located on a line connecting the lower end positions of the reduced pressure absorption panel in the circumferential direction, but the upper end and lower end positions of the reinforcing panel are not on the line. Item 3. A synthetic resin casing according to Item 2. The synthetic resin casing according to any one of claims 1 to 3 , wherein the reinforcing panel has a drop-shaped outline. A plurality of vacuum absorption panels are provided on the peripheral wall, and concave reinforcement panels are provided between the vacuum absorption panels near the top of the vacuum absorption panel,
The reinforcing panel is located on a line connecting the upper end position of the vacuum absorbing panel in the circumferential direction, but the upper end and lower end positions of the reinforcing panel are not on the line,
The width of the column between the vacuum absorption panels is the narrowest at the center of the trunk,
The width of the reinforcing panel is wider than the width of the columns between the vacuum absorbing panels,
The reinforcing panel has a drop profile,
A synthetic resin casing characterized in that the width of the reinforcing panel is equal to or less than the width of the vacuum absorbing panel . The reduced pressure absorption panel is composed of an arc-shaped first panel adjacent to the pillar portion and a second panel located inside the first panel, and the depth of the reinforcing panel is equal to or greater than the depth of the first panel. The synthetic resin casing according to claim 5 , which is 0.5 to 2.5 mm. The synthetic resin casing according to any one of claims 1 to 6 , which is a casing having a small capacity of 200 to 900 ml. Comprising a plurality of reinforcing panel disposed at intervals in a circumferential direction, thereby improving the rigidity of the body, according to any one of claims 1 to 7, characterized in that the increased buckling strength Synthetic resin housing.

Images